Amortization Schedule Generator
Generate a month-by-month loan amortization schedule with principal and interest split, extra-payment savings, annual totals, and CSV export - free, in your browser.
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What is Amortization Schedule Generator?
An amortization schedule generator produces the complete payment table for a loan: every monthly payment split into interest and principal, the running balance, totals, and payoff date. It supports extra monthly payments for early-payoff planning and rolls the numbers up into yearly summaries, with CSV export for spreadsheets.
Key Benefits
- See the true interest cost of a loan
- Model extra-payment payoff scenarios
- Yearly totals for tax planning
- CSV export for Excel and Sheets
Common Use Cases
- •Mortgage and home loan planning
- •Car loan and personal loan schedules
- •Comparing loan term offers
- •Early payoff and refinancing decisions
How to Generate an Amortization Schedule
- Enter loan details: Type the loan amount, annual interest rate, and the term in years and months.
- Add an extra payment (optional): Enter an extra monthly amount to see how much earlier the loan pays off and how much interest you save.
- Pick the start month: Choose when the first payment is due so dates and the yearly summary line up with your calendar.
- Review and export: Read the monthly table or yearly summary, then copy the summary or download the full schedule as CSV.
Key Features
- Month-by-month principal and interest breakdown
- Extra-payment what-if with payoff date
- Annual roll-up summary view
- CSV export of the full schedule
- Handles terms up to 50 years
- Works offline in your browser
Frequently Asked Questions
What is an amortization schedule?
It is a table showing every scheduled loan payment split into interest and principal, plus the remaining balance after each payment. Early payments are interest-heavy; later ones pay down principal faster.
How is the monthly payment calculated?
The standard annuity formula: payment = P times r divided by (1 minus (1 + r) to the power of minus n), where P is the loan amount, r the monthly rate (annual rate divided by 12), and n the number of payments.
How do extra payments change my loan?
Extra amounts go straight to principal, which shrinks the balance faster and cuts total interest. The tool shows the new number of payments, payoff date, and interest saved automatically.
Can I export the schedule to Excel?
Yes. Click Download CSV to save the full monthly table, then open it directly in Excel, Google Sheets, or any spreadsheet app.